Pocket - When you find something you want to view later, put it in Pocket.
GrowList App - Keep track of digital content: Create a personalized feed from subreddits, YouTube-channels and tech-news and organize articles into folders. The web app provides full-text search for all articles you saved.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Instapaper - Instapaper is a simple tool to save web pages for reading later.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.